Adjustable mounting column



FIG. 1 is a front elevation view of an adjustable mounting column according to the invention;

FIG. 2 is a rear elevation view of the adjustable mounting column of FIG. 1;

FIG. 3 is a left end view thereof;

FIG. 4 is a right end view thereof; and,

FIG. 5 is a perspective view thereof.

The structures shown herein in broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for an adjustable mounting column, as shown and described. 